Accounting and bookkeeping machine



July 27, 1937. 1-

ACCOUNTING AND aooxxmnne MACHINE Filed Dec. 3, 1931 3 Sheets-Sheet l Q w 3 R awwnto'o Albert Ott 'July 27, 1937. A. on

ACCOUNTING AND sooxxmarme MACHINE 3 Sheets-Sheet 2 Filed Dec. :5, 1931 gvwenfoc Albert On His dtlmncq July 27, 1937.

A. OTT

ACCOUNTING AND BOOKKEEPING MACHINE .F 'i1ed Dec. 3, 1931 5 Sheets-Sheet 5 His dmywm;

Patented July 27, 1937 UNITED STATES PATENT OFFICE .National Cash Register Company, Dayton Ohio, a corporation of Maryland Application December 3, 1931, Serial No. 578,690

Claims.

This invention relates to accounting or bookkeeping machines of the well-known Ellis type, 'such as are illustrated and described in Letters Patent of the United States, Nos. 1,197,276 and 1,197,278, issued September 5, 1916 to Halcomb Ellis; Patent No. 1,203,863, issued November 7, 1916 to Halcomb Ellis; Patent No. 1,819,084, issued August 18, 1931 to Emil John Ens; and Patent No. 1,609,768, granted December 7, 1926 to N. W. Perkins.

I-Ieretofore when an overdraft occurred in the add-subtract totalizer of the type of machine referred to above, the complement of this overdraft remained in said totalizerQ For example, let us assume that an overdraft of one hnudred dollars has occurred. A reading of the overdrawn totalizer gave the complement of this amount or 9,999,900.00. As it was desirable that the positive rather than the negative amount of the overdraft be printed, it was necessary to operate the machine through several complete cycles in order to transpose and print the negative overdraft as a positive amount.

One of the objects of this invention is to make it possible, when desirable, to tie two add-subtract totalizers together in such a manner that one of said totalizers is always complementary to the other, so that when one totalizer is overdrawn, a reading of the other totalizer will give the positive amount of the overdraft.

Another object is to provide means for locking the total key of either totalizer while said totalizer is in an overdrawn condition.

Another object is to supply means for enabling or disabling the overdraft feature at will.

With these and incidental objects in view, the invention includes certain novel features of construction and combinations of parts, the essential elements of which are set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of said drawings: Fig. 1 is a top plan view of the left side of the machine embodying the present invention, and shows the overdraft mechanism.

Fig. 2 is aleft side elevation showing the overdraft mechanism. a

Fig. 3 is a detail view of a portion of the overdraft disabling mechanism.

Fig. 4 is an assembly illustrating the overdraft disabling lever and its supporting brackets.

Fig. 5 is a view showing the side spacing of a portion of the mechanism illustrated in Fig. 4.

Fig. 6 is a detail showing part of the No. 3 total key locking mechanism.

Fig. 7 is a view of the overdraft and totalizer controlling mechanism as observed from the left of .the machine.

Fig. dis a view taken from the left side of the machine and shows in detail the total key locking mechanism and part of the totalizer controlling mechanism.

Fig. 9 shows in detail the left end of the totalizer lines and a portion of an actuator rack.

Fig. 10 is a perspective illustration of the add and subtract hanging bars, and a fragment of a tabulating stop bar, which has assembled thereon traveling carriage tabulating stops.

General description The machine of the present invention, as previously stated, is of the well-known Ellis type, having a plurality of. totalizers which are actuated by key-controlled reciprocating racks.

The keyboard is of conventional adding machine construction having a plurality of keys arranged in denominational rows. There is also a row of control keys located on the left of the keyboard which control the functions of the different totalizers.

The machine is operated by a constantly running electric motor of conventional design which is clutched to the machine operating mechanism by the depression of a touch bar, and is automatically de-clutched therefrom at the end of machine operations.

The machine in preferred form has four totalizers arranged in parallel pairs, one above the other, at the rear of the machine. The two upper totalizers are adapted for addition and subtraction, while the lower totalizers are of straight adding type. The wheels of the add-subtract totalizers are rotated in one direction for addition, and in the opposite direction for subtraction. There is a dual transfer mechanism for each addsubtract totalizer, which shifts automatically to accommodate the type of transaction being made.

The overdraft feature is incorporated in the two add-substract totalizers, so that when one of these totalizers is selected for an additive operation, the other is automatically selected for a substractive operation, and vice versa; the result being that when either of the totalizers is overdrawn, a reading of the other totalizer will give the positive amount of said overdraft, which is the result desired.

The machine of the instant invention is equipped with the usual type of traveling carriage, and printing means to print amounts and totals thereof. If desired, the machine may also be equipped with a typewriter keyboard and type.

All the totalizers are selected for addition by means of stops cooperating with hanging bar levers, said stops being arranged in desired location upon the traveling carriage.

When using the overdraft feature of the instant machine, the two add-subtract totalizer-s are also selected for addition or subtraction by means of stops located in predetermined positions upon the traveling carriage. These stops are arranged so that when one add-subtract totalizer is selected for addition, the other totalizer is selected for subtraction.

Locking mechanism has been provided which locks the total key of either add-subtract totalizer against depression whenever said totalizer is in an overdrawn or negative condition. Also, an interlock has been incorporated between the total keys for the two add-subtract totalizers, which prevents the simultaneous depression of these keys. In the description to follow the mechanism outlined above will be explained in detail.

Detailed description As stated in the preceding general description, the machine of the instant invention has four totalizers (Figs. 2 and 9) supported between a pair of main frames 25, only one here shown in Fig. 1, which for convenience will be numbered as has heretofore been the custom. The upper front totalizer or accumulator (Fig. 2) will be called No. 1, the lower front No. 2, the upper rear No. 3, and the lower rear No. 4, as they are designated in the above mentioned Ens patent.

The two upper totalizer-s, Nos. 1 and, 3, are adapted for both addition and subtraction. These two totalizers and their associated mechanisms are substantial duplicates of each other, and are substantially the same as that which has been fully described in the Ellis Patent No. 1,203,863, referred to above, and Patent No. 1,508,267, issued September 9, 1924, to F. W. Bernau. It is, therefore, thought unnecessary to again treat this mechanism in detail.

Operating mechanism and 32, which operate in unison with said shaft 30.

Add and subtract mechanism for the No. 1

. totalizer The operating plate 3| (Fig. ,8) has pivoted thereon a flying lever 33, the lower end of which is arranged to cooperate with apair of pawls 34 and 35 pivoted on a subtract control lever. 36 which is pivoted on a stud 21 secured between the left side frame 25 and a sub-frame I! (Fig. 2). A link 31 (Fig. 8) pivotally connects the upper end of the lever 33 with a stud 38 in a crank "secured to a shaft 40 journaled in a pair of front totalizer frames not here! shown. Secured to the shaft 40 is a pair of cam arms 23 (Fig. 9-one only here shown) having cut therein cam slots which cooperate with a pair of rollers pivoted on either end of the No. 1

totalizer shaft, which is mounted in a pivoting frame (not shown) supported between the front totalizer frames. The No. l totalizer shaft has rotatably mounted thereon a plurality of totalizer wheels adapted to cooperate with a plurality of actuator racks 41.

Pivoted on the upper end of the flying lever 33 is a pawl 4i urged counter-clockwise against the stop stud 42 by spring 43. The upper end of the pawl 4i is adapted to cooperate with a stud 44 in a controlling crank 45 pivoted to the left machine frame 25. The lower end of the pawl 41 is arranged to cooperate with a square stud 46 carried by the plate 3i.

The upper arm of the lever 33 has thereon a flat surface which cooperates with a square stud 43, which connects the plates 3i and 32.

In additive operations the initial clockwise movement of the operating plate 3| causes the lower end of the pawl 4| to be engaged, the stud 45 to rock the shaft 40 counter-clockwise to engage the No. 1 totalizer wheels with the actuator racks 41. The return movement counterclockwise of the plate 3! causes the stud 48 to engage the flying lever 33, to rock the shaft 4|) clockwise, thereby disengaging the No. 1 totalizer wheels from the actuator racks 41.

The lower end of the controlling crank 45 (Fig. 8) is adapted to cooperate with the left end of a controlling latch 49 pivoted to the left side frame. The right end of the latch 49 is pivoted to the lower end of an add hanging bar 50, whose upper end is slotted to receive the left end of an add hanging bar lever 5i (Figs. 8 and 10) for the No. l totalizer. The lever Si is pivoted on a stud 52 carried by a tabulating frame (not 1 here shown). The right-hand end of the lever 5i has an upturned extension 53 adapted to cooperate with a lug 54 on a tabulating stop 55 carried by a tabulating stop bar 56 secured to the usual traveling carriage (not shown).

The plate 3| (Fig. 8) has a nose 5'! which cooperates with a bent extension 58 on a lever 59 pivoted at 60 to the frame 25. Pivoted on the upper end of the lever 59 (Fig. 8) is a link 18 having in its upper end a slot adapted to cooperate with the stud 44 in the crank 45 to restore said crank near the end of an add operation. The upper end of the lever 53 has therein a stud 8| which cooperates with a latch 62 pivoted at 63 to the frame 25. notched on its left end (Fig. '7) to engage a stud 64 in a lever 65 secured to a transfer shaft 66 also iournaled in the front totalizer frames. A spring 61 urges the lever 65 and shaft 66 counterclockwise to restore the transfer mechanism to normal position. Pivoted on the upper end of the lever 65 is a flexible latch .68 composed of a hinge member 69 and a hook member 10, each having adjacent flat portions which are held in contact by a spring 1 I. A spring I2 is tensioned between the flexible latch 63 and latch 62 to urge said latches in a clockwise direction, thereby enabling them to perform their functions satisfactorily.

Add and subtract mechanism for the No. 3 totalizer The adding and subtracting mechanism for the No. 3 totalizer is similar in every respect to that of the No. 1 totalizer explained above. Therefore, the No. 3 mechanism will be treated somewhat briefly in the following description.

Pivoted on the operating plate 32 (Fig. 7) is a flying lever 13, the lower end of which is adapted to cooperate with a pair of pawls "i4 and The latch 52 is Q has pivoted thereon a flexible member I93 com- 15, pivoted on a control lever I8 also pivoted on the stud 21. The lever I3 cooperates with the stud 48 in the same manner as the lever 83 to disengage the No. 3 totalizer wheels from the actu-' ators 41 in adding operations. A link I9 (Fig. 'I) connects the flying lever I3 with a stud H3 in a crank 89 secured on a shaft 8| journaled in a pair of rear totalizer frames 95 (one only here shown in Fig. 1). A pawl 82 pivoted on the upper end of the lever "is identical to and operates exactly the same in relation to the No. 3 totalizer as the pawl 4| does to the No. 1 totalizer.

The upper end of the pawl 82 cooperates with a stud 83 in a controlling crank 84 pivoted to the frame 25. The lower end of the crank 84' is adapted to engage a latch 95 also pivoted to the frame 25. The right-hand end of the latch is pivoted to a hanging bar'85 (Figs. '7 and 10), whose upper end is slotted to receive a hanging bar lever 81 for the No. 3 totalizer. The lever 81 is pivoted on the stud 52 and has an upturned extension on its right-hand end which is adapted to cooperate with a lug on atabulating stop 88, which is similar to the stop 55 and selects v the No. 3 totalizer for add operations in tabulated positions of the traveling carriage.

The operating plate 32 (Fig. '7) has a nose 89 which cooperates with a right-angled extension 99 on a lever 9| also pivoted at 59 to the frame 25. Pivoted on the upper end of the lever.8| is a link |48| having in its upper end a slot adapted to cooperate with the stud 83 in the crank 84 to restore said crank near the end of an adding operation. The upper end of the lever 9| has therein a stud 92 which extends through a slot in a link 93 whose left end is pivoted to an armof a latch 94 pivoted at to the rear totalizer frame 95. The latch 94 is notched on its left end to engage a stud 91 in a lever 98 secured to a transfer shaft 99 journaled in the frame 95. Pivoted on the upper end of the lever 98 is a flexible latch I99 which is substantially a. duplicate of the latch 58. A spring IN is tensioned between the latches 94 and I99 to urge said latches clockwise. A spring |4I urges the arm 98 and shaft 99 counterclockwise to restore the transfer mechanism to normal position.

Overdraft mechanism A stud I92 (Fig. 7) secured to the frame 25 posed of levers I94 and I95. A spring I95 is tensioned to hold an arm I9'I of the lever I94 in contact with an eccentric adjuster I98 carried by the lever I95. The left end of the lever I94 is arranged to cooperate with a stud I99 in a plate 9 secured to the latch I99. A torsion spring III urges the member I93 clockwise to normally hold the latch I99 in ineffective position, as shown in Fig. '7. The right-hand end of the lever I95 cooperates with a stud 2 carried by the No. 1 hanging bar 59. The lever I94 carries an adjustable arm 4 having therein a stud 5 which is adapted to cooperate with an arm |I6 carried by the latch 58. The hook members of the latches 58 and I99 are adapted to look over the studs 38 and H3, respectively. for a purpose to be later described.

The hanging bar 85 (Figs. 2, 8 and 10) has a horizontal surface formed thereon, which is adapted to cooperate with a'nose of a lever III pivoted on a stud 8 carried by a bracket I48 secured to the sub-frame 11. The right-hand end of the lever I II has pivoted thereto a selecting plate I I9 which has formed thereon a pair of selecting lugs I29 and |2|. The lug I29 is arranged to cooperate with a pin m (Fig. '1) in the No. 3 totalizer control lever I9, and the lug |2I (Fig. 8) is adapted to cooperate with a pin I I 23 carried by the No. 1 totalizer lever 35. The

top surface of the plate I I9 cooperates with a subtracting cam lever I24pivoted on the stud 21. The lever I24 has an extension I25 adapted to cooperate with a roller I 28 carried by a substracting latch I21 pivoted at I28 to the frame 25.

The upper end of the latch I2I (Fig. 7) carrice a stud I29 adapted to cooperate with a subtracting lever I39 pivoted on the stud |3| carried by the frame 25. An arm I32 of the lever I39 is connected by a link I33 to subtract hang- I ing bar lever I34 (Fig. 10) pivoted on the stud 52. The lever I34 has on its right end an upturned extension I35 arranged to cooperate with the lug I35 on the stops 55 and 88. Pivoted also on the stud 52 is a pair of hanging bar levers I31 and I38 which coact with stops on the tabulat'ing bar 58 to condition the Nos. 2 and 4 totalizers for add operations when the traveling carriage is tabulated to predetermined positions. Pivoted on the latch I21 is a link I39 (Fig. 7) having cut therein a cam slot I49. adapted to cooperate with a stud I42 on the frame 25. The left end of the link I39 carries a stud I43 which cooperates with the lower edge of the hook member III of the flexible latch 58.

When the traveling carriage is tabulated to a particular position where it is desired to add in No. 3 totalizer and subtract in No. l, a lug I59 on the stop 88 selects the No. 3 totalizer for an add operation by engaging and rocking the hanging bar lever 81 clockwise. This lifts the hanging bar 85 (Fig. 8) rocking the lever ||I clockwise, to shift the selecting plate 9 to the left, where the lug |2| will be in operative alinement with the stud I23. Simultaneously with the above operation, the lug I35 on the stop 88 contacts and rocks. the subtract hanging bar lever I34 (Fig. 10), the lever I39 (Fig. 7), and the latch I2'I clockwise. The roller I25 (Figs. 7 and 8) on the lever I2'I coacting with the extension I25 rocks the cam lever I24 clockwise. The lever I24 forces the selecting plate 9 downwardly, which, through the lug I2| and pin I23, rocks the lever 35 and pawls 34 and 35 clockwise to condition the No. 1 totalizer for a subtract operation.

Clockwise movement of the lever |2I (Fig. '7) moves the link I39 to the left, causing the cam slot I49 in cooperation with the stud I42 to lower the left end of the link I39 to allow the latch 98 to move to a position where the hook member 19 will be in the path'of the stud 38 on the No. l totalizer engaging arm 39. Initial movement clockwise of the operating plate 3| (Fig. 8) releases the lever 59 and causes the lower end of the flying lever 33 to contact the pawl 34, to rock the arm 39 and shaft 49 counter-clockwise, in the manner fully described in the above mentioned patents. This causes the stud 38 to engage the hook lever 19, thereby rocking the shaft 55 clockwise. The clockwise movement of the shaft 55 shifts the transfer mechanism for the No. 1 totalizer to its subtract position. The releasing of the lever 59, as explained above, renders the latch 52 effective, which under tension of the spring I2 (Fig. '7) engages the stud 54 in the arm 55 to retain the transfer mechanism in substract position.

When the cycle of operation is nearly completed the nose 51 on the plate 3| engages and rocks the lever 59 clockwise to move the latch 52 counter-clockwise, thereby releasing the arm 55,

shaft 39 counter-clockwise to restore the transfer m to normal adding position.

Whe the No. 3 hanging bar lever 91 (Figs. 8 and 10) is released by changing the position of the traveling carriage, the torsion spring I (rig. in rocks the lever III counter-clockwise to return the selecting plate III to its normal position, in which it is shown in Fig. 8. Likewise,

releasing of the subtract hanging bar lever I34 by shifting the traveling carriage allows the latch I31, link I39 and flexible latch 99 to be restored to normal positions by means of a spring I (Fig. 7). A spring I, tensioned between the levers I I! and selecting plate I II, likewise restores the plate 9 and cam lever I to normal positions as shown in Figs. 7 and 8.

The No. 1 totalizer is selected for addition and the No. 3 totalizer for subtraction by tabulating the traveling carriage to a position where the lug 54 on the stop 55 will engage the extension 53 of the add hanging bar lever 5|, and the'lug II! will engage the extension I35. of the subtract lever I34, rocking said lever clockwise. The clockwise movement of the lever 5| lifts the bar (Fig. '1), which, by means of the stud III, rocks the lever I03 counter-clockwise to lower the flexible latch I" so that the hook thereon will be in operative alinement with the stud 3 carried by the crank 99 for the No. 3 totalizer. Counter-clockwise movement of the lever I93 also moves the stud H5 in the path of the arm IIG to block the movement of the flexible latch 69 so that the moving of the latch I21 and link I39 by the rocking of the subtract hanging bar as explained above, will have no effect on said flexible latch 69. The clockwise rocking of the latch I21 rocks the cam lever I clockwise, causing the lug I39 (Fig. '7) to engage the stud I22- to rock the lever I5 clockwise to condition the No. 3 totalirer for a subtract operation, which is similar to that ofthe No. 1 totalizer explained Initial movement clockwise ,of the operating plate 32 (Fig. 7) releases the lever 9| and the latch 94, and causes the flying lever II to engage the pawl 14 to rock crank II and shaft II counter-clockwise. The hook on the latch Ill, cooperating with the stud III, rocks the shaft 99 and lever 99 clockwise to shift the transfer mechanism for the No. 3 totaiizer to subtract position. when the lever 98 reaches the extent of its clockwise movement the stud 91 is engaged by the latch 94 to hold the No. 3 transfer mechanism in subtract position until the cycle of operation is nearly complete. The nose 39 on the plate 32 then engages and rocks the lever 9| clockwise, disengaging the latch 94 from the stud 91. The spring III then restores the No.3 transfermechanism to its normal adding position.

Total key locking means Means are provided for locking the total key for the No. 3 totaiizer when this totalizer has a negative amount thereon. The means for locking the No. 1 total key under like conditions is substantially the same as that shown in the patents cited below, and therefore, it will be briefly treated herein. Reference may be had to Patout No; 1,508,267, issued September 9, 1924, to I". W. Bernau, and Patent No. 1,609,788, issued to N. W. Perkins December 7, 1926, for a detailed description of the locking mechanism for the No. 1 total key when an overdraft occurs,

The means for locking the No. 3 total key when which, under tension of the spring 51, rocks the an overdraft occurs in the No. 3 totaliser will now be explained. Referring to Figs. 1 and 2, an overdraft shaft I" for the N0. 3 totalizcr pivoted between the rear totalizer frames II is automatically rocked counter-clockwise when an overdraft occurs in the No. 3 totalizer, and is automatically returned to original position whenever the No. 3 totalizer is restored.to a positive condition. The means for operating the No. 3 overdraft shaft Ill is identical to that of the No. 1 overdraft shaft, as described in the patents referred to above. Therefore, it is thought unnecessary to include a lengthy description of this mechanism herein. Secured to the shaft I" (Fig. 8) is an arm IIII pivotally connected by a link ill to a pitman I32. The pitman I5! is slidably mounted on the'maehine by having its left end slotted to embrace a stud I53 in a bracket I54 (Fig. 1) secured to a keyboard plate I55. The forward end of the pitman I52 has formed thereon a lug I59 (Fig. 6) supported by a bracket III also secured to the keyboard plate I55. The lug III is. arranged to cooperate with a notch Ill in the stem of a No. 3 total key I59.

When an overdraft occurs in the No. 3 totalizer, causing the overdraft shaft I" to rock counter-clockwise, the pitman I52 is moved thereby toward the rear, causing the lug I56 to enter the notch I53, thus locking the No. 3 total key against depression. The instant the No. 3 totalizer is restored to a positive condition by adding therein an amount larger than that of the overdraft, the shaft I" is returned clockwise to normal position, thereby unlocking the No.3 total key. A spring I89 (Figs. 1 and 2) secured to the keyboard plate I- is arranged to cooperate with two notches in the pitman I52 to retain said tion.

The No. 1 totalizer has an overdraft shaft "5 (Fig.8) journaied in the front totalizer frames,

and has secured thereon an'arm I93 similar to the arm I55. The arm I38 is connected by a link I31 to a pitman I68 (Figs. 2 and 8) having a slot which embraces a. stud (not shown, but like stud I53) carried by the tabulating frame. The forward end of the pitman I98 is pivotally connected to a lock lever I69 pivoted at IN to the frame 25. The lower end of the lever I99 has bent thereon a lug I'll adapted to engage a notch III in a No.1 total key Ill.

The occurrence of an overdraft in the No. 1 totalizer rocks the overdraft shaft I counterclockwise, causing the lug I19 to enter the notch III to lock the No. 1 total key I12 against depression when a negative amount is in the No. 1 totalizer. Restoration of the No. l totalizer to a positive condition rocks the overdraft shaft I95 clockwise, removing the lug "II from the notch III thereby unlocking the No. 1 total key.

Interlocking mechanism for the N0. 1 and No.3 total keys As an added precaution against depressing both the No. land No. 3 total keys simultaneously, an interlock between these keys has been added. Secured to the lock lever I89 (Fig. 8) is an arm having a hook I13 adapted to cooperate with a stud I14 carried by the No. 3 total key I59. Thus it can be seen that depression of the No. 3 total key I59 causes the stud I'll to engage the hook In to force the lever I99 counterclockwise, causing the lug III thereon to enter the notch III, thereby locking the No. 1 total key I12 against depression. Again depression of the No. 1 total key causes the notch I" to pass beyond the lug I10, thereby blocking the counter-clockwise movement of the lever I69. This holds the hook I13 in the path of the stud I14, thus preventing depression of the No. 3 total key when the No. 1 key is depressed. I

Subtract disabling mechanism Hechanismhas been provided by which the subtracting mechanism for the No. 3 totalizer may be disabled in order to make said totalizer a straight adding totalizer. Such mechanism will now be explained.

Pivoted on the braket I48 (Figs. 2 and 4) is a multi-armed lever I15 having a finger-piece I16. The lever I15 has an arm I11 to which is pivoted 1 a plunger I18, the lower end of which extends through a hole in an angle piece I19 secured to the bracket I48. A compression spring I80 wound 20 around the plunger I18 is tensioned to retain the lever I15 in either its forward or rearward position. An arm I8I of the lever I 15 is pivotally connected by a link I82 to a latch I83 (Fig. 2) pivoted to a stud I84 in a left carrying plate I85 ,(Fig. 1). The upper end of the latch I83 has therein an open ended slot I86 adapted to hook over the stud' I 09 carried by the flexible latch I00. Another arm I81 (Figs. 3 and 4) of the lever I15 has therein a stud I90 arranged to cooperate with the lower edge of the lever II1 for a purpose to be later described.'

Another arm I 9I (Fig. 3) of the lever I15 is hooked-shaped to latch over a stud I93 in the upper end of a link I94 whose lower end is pivoted to an extension I95 of the bracket I48. Also pivoted on the stud I93 (Figs. 2 and 4) is a lever I96 having its upper end pivotally connected by a link I91 to a crank I98 secured to a ribbon color shifting shaft I99 journaled in a top frame 200 supported between the main frames of the machine. The lower arm of the lever I 96 has pivoted thereto the rear end of a link 20I, the front end of which is slotted to embrace a stud 202 secured in the No. 3 total key latch 203 pivoted at 204 to the frame 25. The upper end of the latch 203 has bent thereon a lug 205 adapted to enter a notch 206 in the No. 3 total key I59.

With the lever I15 in the position shown in Figs. 2 and 4, the subtract mechanism for the No. 3 totalizer is effective, as also is the ribbon color-shifting mechanism. If there is no need for the direct overdraft feature, and it is desired to use the No. 3 totalizer as a straight adder only, all that is required is the moving of the multi-armed lever I15, through its finger piece I16, clockwise to its disabling position, as shown by dot-and-dash lines in Fig. 2. This causes the latch I83 to hook over the stud I 09 to retain the flexible transfer shifting pawl I 00 in ineffective position. Likewise, when the lever I15 is in its disabling position the stud I 90 engages the lower edge of the lever II1 thereby moving said lever H1 and the selecting plate II9 (Fig. 8) to a position where only the No. l totalizer may be conditioned for a subtract operation.

When the lever I15 is in position to allow subtraction in the No. 3 totalizer, the hook I9I (Fig. 3) engages the stud I93, holding it and the link I94 stationary. As the pivot point I 93 for the 7- lever I96 (Fig. 4) is now held stationary, the clockwise rocking of the latch 203 when the No. 3 total key is depressed, through the link 20I, (Figs. 2 and 4), lever I96 and link I91 rocks the crank I98 and shaft I 99 counter-clockwise, to shift the ribbon mechanism to a position where the red portion of a brlchrome ribbonwlll 'be alined with the printing type in order to print an overdraft in a distinctive color. a

Moving the lever I15 clockwise to ineffective position removes the hook I9I (Fig. 3) from the 5 stud I93, so that depression of the No. 3 total key causes the link I94 to pivot idly. Thus, the connection between the latch 203 and shaft I 99 is disabled, so that when the overdraft feature is not in use, depression of the No. 3 total key I59 10 will have no effect on the ribbon shifting mechanism. Y 7

Statement of operation As an example of the use of the above described overdraft mechanism, let us assume thata depositor in a certain bank has a balance of one thousand dollars on his checking account. This depositor issued three checks, one for five hundred dollars, another for four hundred dollars, and a third for two hundred dollars, thereby overdrawing his account one hundred dollars. The present invention makesit possible to print the positive amount of the above overdraft at the time of its occurrence; without having to take the machine through a series of operations to transpose a complementary overdraft into a posi- (v tive amount, as has heretofore been necessary.

With this thought in mind a sequence of operation will be given, in which' the No. 3 totalizer 30 will be used to print the positive overdraft. This is merely a matter of choice, as the No. l totalizer may, if desired, be used to print the positive overdraft.

Assuming both the No. 1 and No. 3 totalizers to 35 be standing at zero, the old balance of one thousand dollars is simultaneously added in the No. 1 totalizer and subtracted from the No. 3 totalizer, and printed in the proper column on a work sheet, having a plurality of columnar divisions. This 40 is accomplished by properly locating the stop 55 upon the traveling carriage tabulating stop bar 56. Next the checks of five hundred dollars, four hundred dollars and two hundred dollars, issued against this balance of one thousand dollars, are subtracted therefrom in the No. 1 totalizer, and 45 simultaneously added to the complement of the balance in the No. 3 totalizer, and at the same time printed upon the work sheet. This results in an overdraft of one hundred dollars, which leaves the complement thereof in 50 the No. 1 totalizer, and the positive amount of one hundred dollars in the No. 3 totalizer. Generally three columns of the work sheet are used for the listing of checks. This, however, may be varied if desired. For each check listing column a stop a B8 is properly located upon the tabulating stop bar 56, and as previously stated, selects the N0. 3 totalizer for additive and the No. 1 totalizer for subtractive operations.

The next step is the tabulating of the traveling 60 carriage to anew balance column on the work sheet, and in this position a stop is used which selects both the No. l and No. 3 totalizers for addition, whereby when the operator takes the new balance or the overdraft of the account, that sum cleared from either totalizer is added into the other totalizer. As hereinbefore set out, the occurrence of an overdraft automatically locks the total key in the overdrawn totalizer, and in 7 the instant example, as the No. l totalizer has been overdrawn, its total key I12 is automatically locked thereby. The adding of the several checks to the complementary old balance places the No. 3 totalizer in a positive condition, thereby unlocking its total key I". The fact that an overdraft exists is made manifest to the operator when an attempt is made to strike a new balance by taking a total from the N0. 1 accumulator from which the several checks have been subtracted.

The No. 3 total key is then depressed to take the I total of the No.3 totalizer to ascertain the amount of the overdraft. Since a total operation supersedes an adding operation, the fact that the No. 3 totalizer had previously been selected for an add operation, does not in any way interfere with the succeeding total taking operation. Therefore, the depression of the No. 3 total key, and operation of the machine results in the clearing of the No. 3 ,totalizer, the printing of the positive or direct overdraft, and the clearing of the No. 1 totalizer by adding the positive overdraft to the complement contained in said No. 1 totalizer. An illustration of the condition of the No. 1 and No. 3 totalizers at different stages of an overdraft operation is given below:

Add :1000 0,001,000.00 Subt. $1000 9,999,000.00 Subt. Add 3500..-.-- 9,999,500.00 Subt. 400 0,000,100.00 Add 400-..--- 9,999,900.00 Subt. 200---- 9,999,900.00 Add 200 0,000,100.00

No. 3 totaliser is now cleared by- Addlng $100 -o,ooo,ocaoo Subtracting 810)----0, 000, 000.00

In summarizing it will be seen: That, the No. 1 and No. 3 totalizers may be used alternately for addition or subtraction. That, it matters not in which totalizer an overdraft operation is begun. That the use of the overdraft feature described herein is discretionary. but when being used, the No. l and No. 3 totalizers are coupled together, so that when you add in one, you automatically subtract from the other, and vice versa. That, when using the overdraft feature the total keys for the No. 1 and No. 3 totalimers are automatically locked when their respective totalizer is overdrawn, and released when said totalizer is restored to a positive condition. which in eiIect makes said keys indicative of the plus or minus condition of their respective totalizers.

while the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms all coming within the scope of the claims which follow.

What is claimed is:

1. In a machine of the class described, the

combination of a plurality ofadd-subtract totalizers; means for conditioning said totalizers for add operations; means for conditioning said totaliaers for subtract operations; means common to the totaliners for operating the subtractive conditioning means; selecting means intermediate the operating means and the subtractive conditioning means; and means for shifting the selecting means when one totalizer is conditioned for addition so that another totalizer may be automatically conditioned for subtraction by said operating means.

2. In a machine of the class described. the combination of a plurality of add-subtract totalizers; additive conditioning means for each totaliser; subtractive conditioning means for each totaliser; means common to the totalizers for operating the subtractive conditioning means; selecting means intermediate the subtractive conditioning means and said operating means, said selecting means arranged to normally select a particular totaliser for subtraction; and means for shifting the selecting means to select another totalizer for subtraction when said particular totalizer is selected for addition.

3. In a machine of the class described having a traveling carriage, the combination of two add-subtract totalizers; normally ineffective additive conditioning means for each totalizer;

normally ineffective subtractive conditioning means for each totalizer; means operated by the traveling carriage for rendering effective the additive conditioning means of either totalizer; and means operated by the additive conditioning means for one totalizer for rendering eflective the subtractive conditioning means of the other totalizer.

4. In a machine of the class described having a traveling carriage, the combination of two addsubtract totalizers; additive conditioning means for each totalizer; subtractive conditioning means for each totalizer; means on the traveling carriage for operating the additive conditioning means of either totalizer; means controlled by said traveling carriage for operating the subtractive conditioning means for either totalizer; and means controlled by the additive conditioning means of one add-subtract totalizer for causing the subtractive operating means to be electively coupled to the subtractive conditioning means of the other add-subtract totalizer.

5. In a machine of the class described having a traveling carriage, the combination of two addsubtract totalizers; additive conditioning means for each totalizer; subtractive conditioning means for each totalizer; a subtractive operating means for both totalizers; means on the traveling carriage for making the additive conditioning means of either totalizer effective; means on the traveling carriage for making the subtractive operating mechanism effective; and means controlled by the additive conditioning means of one totalizer for causing the subtractive conditioning means of the other totalizer to be eflective and simultaneously making ineiIective the other subtractive conditioning means.

6. In a machine of the class described having a traveling carriage, the combination of two addsubtract totalizers; total taking means for each totalizer; means controlled by the traveling carrlage in one position thereof for selecting one totalizer for addition and the other totalizer for subtraction, to add an amount in said one totalizer and subtract it from said other totalizer to obtain the complement of the amount on said one totalizer; means controlled by the traveling carriage in another position thereof for selecting said other totalizer for addition and said one totalizer for subtraction to subtract an amount from said one totalizer and simultaneously add said amount to the complement in said other totalizer; and means for automatically locking the total taking means of either totalizer when an overdraft occurs therein.

7. In a machine of the class described, the

combination of two add-nibtract totalizers; a

shiftable add-subtract control means for the carrying mechanism of each totalizer; means for shifting the control means: an additive conditioning means for each totalizer; a shiftable subtractive conditioning means for both totalizers normally in position to condition a certain totalizer for subtraction; a traveling carriage; means on said traveling carriage for operating the additive conditioning means of a particular addsubtract totalizer and simultaneously eifectuat- 2,088,099 ing the subtractive conditioning means; means operated by said additive conditioning means of the particular totalizer for making effective said carrying mechanism control means of said certain totalizer and simultaneously disabling the carrying mechanism control means of said particular totalizer; means on said traveling carriage for operating the additive conditioning means of said certain totalizer; and means operated by said last mentioned additive conditioning means for shifting the subtractive conditioning means to a position where said particular totalizer will be conditioned for subtraction simultaneous with the conditioning of said certain totalizer for addition.

8. In a machine of the class described having a traveling carriage, the combination of two addsubtract totalizers; a shiftable control means for the carrying mechanism of each totalizer; and

selecting means for both totalizers; means on the traveling carriage for making effective the add selecting means of one totalizer; means operated by the add selecting meansfor making effective the control means for the carrying mechanism of the other totalizer and simultaneously disabling the control means for the carrying mechanism of said one totalizer.

9. In a machine of the class described having a traveling carriage, the combination of two totalizers adapted for addition and subtraction; means controlled by the traveling carriage in a predetermined position for causing amounts to be added in one totalizer and simultaneously subtracted from the other; means controlled by said traveling carriage in another predetermined position for causing amounts to be subtracted from said one totalizer and added to the other tota'l izer so that the amounts in said totalizers are always complementary to each other; total taking means for each totalizer; and means controlled by each totalizer for locking its total taking means when an overdraft occurs therein to compel the totalizing of the unlocked totalizer to ascertain the positive amount of the overdraft.

10. In a machine of the class described, the combination of an add-subtract totalizer; another add-subtract totalizer in which the subtract mechanism is normally disabled; manipulative means for enabling the subtract mechanism of the last mentioned totalizer; means for controlling the operations of the two totalizers so that when either totalizer is selected for addition the other is automatically selected for subtraction to always maintain the amounts in said totalizers complementary to each other; total taking means for each totalizer; and means for locking the total taking means of either totalizer when an overdraft occurs therein, said locking means also adapted to unlock the total taking means when the overdrafted totalizer is restored to positive condition.

11. In a machine of the class described, the combination of a plurality of accumulators capabio of adding amounts therein and subtracting amounts therefrom, means for selecting the totalizers for actuation in such a manner that one totalizer always contains the complement of the other totalizer; actuating means for said totalizers; a device associated with each totalizer to control the clearing thereof to ascertain the balance therein; means associated with each of said devices to lock the-same when the accumulator associated therewith contains a negative amount; and a manipulative means to render said locking means ineffective.

12. In a machine of the class described, 'the combination of two algebraic totalizers and mechanism so arranged that when one totalizer is selected for addition, the other is automati cally selected for subtraction, and vice versa,

whereby one of said totalizers accumulates a positive amount while the other accumulates a complementary amount or overdraft; total taking means for each totalizer; and means con trolled by each totalizer for locking its total taking means when an overdraft occurs therein, so that a total may be taken from only the nonoverdrawn totalizer.

13. In a machine of the class described, the combination of two algebraic totalizers; means so arranged that when one of the totalizers is selected for addition the other is selected for subtraction and vice versa, whereby one of said totalizers accumulates a positive amount while the other accumulates a complementary amount or overdraft; total taking means for'each totalizer; and means effective only when an overdraft occurs in either totalizer for locking the total taking means of the overdrawn totalizer until said totalizer is restored to positive condition.

14. In a machine of the class described, the combination of two algebraic totalizers; means so arranged that when either totalizer is selected for addition the other is selected for subtraction and vice versa, whereby one of the totalizers accumulates a positive amount while the other accumulates a complementary amount or overdraft; total taking means for each totalizer; and means associated with each totalizer for lockin its respective total taking means when said totalizer is overdrawn, said locking means also adapted to unlock the total taking means when its associated totalizer is restored to positive condition.

15. In a machine of the class described the combination of a plurality of algebraic accumulators, actuating means therefor, means for compelling said accumulators to receive simultaneous entries of opposite signs whereby one of said accumulators accumulates a positive total while the other accumulates the complement thereof, manipulative total taking control means for each accumulator, and means for automatically looking the total taking control means associated with the totalizer containing an overdraft.

16. In a machine of the class described the combination of a plurality of algebraic accumulators, actuating means therefor, means for compolling said accumulators to receive simultaneous entries of opposite signs whereby one of said accumulators accumulates a positive total while the other accumulates the complement thereof, manipulative total taking control means for each accumulator, and means for automatically locking one of the total taking control means whenever an amount is standing on the totalizers.

1'7. In a machine of the class described the combination of a plurality of algebraic accumulators, actuating means therefor, means for compelling said accumulators to receive simultaneous entries of opposite signs whereby one of said accumulators accumulates a positive total while the other accumulates the complement thereof,

manipulative total taking control means for each accumulator, means for automatically locking one of the total taking control means whenever an amount is standing on the totalizers, and manipulativemeans to render said compelling means and said locking means ineffective.

18. In a machine of the class described, the

addition and subtraction, subtraction control mechanism for said two totalizers, means to selectively control the addition of an amount into either one of said totalizers, control means to operate the last mentioned means and the subtraction control mechanism, and means operated as an incident to the operation of the control means for disabling the subtraction control mechanism for the selected totalizer and for simultaneously compelling the subtraction of that amount from the other totalizer.

19. In a machine of the class described, the combination of a plurality of accumulators separate accumulator engaging means for each accumulator whereby each accumulator may be controlled to receive positive and negative entries, actuating means for the accumulators, means to jointly control the separate accumulator engaging means to compel the accumulators to receive the same entries in opposite signs so that one accumulator will contain a positive total while combination of two totaliaers adapted for both lators is operable to receive additive entries without corresponding negative entries being made in said other accumulator.

20. In a machine of the class described, the combination of a plurality of accumulators; actuating means therefor; a main actuating shaft; accumulator engaging mechanisms individual to each accumulator, each of said engaging mechanisms comprising a separate train of mechanism between the main actuating shaft and its accumulator; adding and subtracting control means for each engaging mechanism whereby the accumulators can be controlled to receive positive or negative entries; means to selectively control the adding and subtracting control means for each of the accumulator engaging means to compel the accumulators to receive entries in opposite signs whereby one of the accumulators accumulates a positive total while the other accumulates the complement thereof; and means to disable the compelling means whereby the entries may be entered either positively or nega- -tively in one of the accumulators without a corresponding entry into the other.

ALBERT '11. 

